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According to the prevalence of cancer in Iran and the importance of women’ s suffering from breast cancer psychological survey, credit scoring of Resilience instrument has been used in this research. The questionnaire of Connor-Davidson (CD-RISC) - including 25 questions-was answered by 202 breast cancers women who had been under treatment all over Tehran’s hospitals. Confirmatory Factor Analysis(CFA) and Exploratory Factor Analysis (EFA) has been used for validity consideration.In the confirmatory factor analysis, all fitting indices have been found to be optimal and factor matrix has been calculated based on 2 factors. These two factors had totally 48/37% of total variance. The First Value was 10/75 that was 43/025% of total variance and the ratio of the first value to the second was 1/33 that it was 5/319 %of total variance. According to the results, in general the highest Cronbach’s Coefficient Alpha was related to the first factor (α=0/935) and the least was relevant to the second factor (α=0/792) and for the whole factors, (α=0/942) is calculated which shows the high internal coordination. In conclusion, results have proved the accessibility of Connor-Davidson (CD-RISC) instrument in women with breast cancer.